package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 添加购物车
     * @param shoppingCartDTO
     */
    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        //只能查询自己的购物车数据
        shoppingCart.setUserId(BaseContext.getCurrentId());
        log.info("userId:{}",BaseContext.getCurrentId());
        //判断当前商品是否在购物车中
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        //如果已经存在，只需要数量+1
if (list!=null&&list.size()>0){
    ShoppingCart cart=list.get(0);
    cart.setNumber(cart.getNumber()+1);
    shoppingCartMapper.updateNumberById(cart);
}else {
    //如果不存在，需要插入一条购物车数据

    //判断本次添加到购物车的是菜品还是套餐
    Long dishId=shoppingCartDTO.getDishId();
    if (dishId!=null){
        //本次添加的为菜品
        Dish dish =dishMapper.getById(dishId);
        shoppingCart.setName(dish.getName());
        shoppingCart.setImage(dish.getImage());
        shoppingCart.setAmount(dish.getPrice());

    }else {
        //本次添加的为套餐
        Long setmealId = shoppingCartDTO.getSetmealId();
        Setmeal setmeal = setmealMapper.getById(setmealId);
        shoppingCart.setName(setmeal.getName());
        shoppingCart.setImage(setmeal.getImage());
        shoppingCart.setAmount(setmeal.getPrice());

    }
    shoppingCart.setNumber(1);
    shoppingCart.setCreateTime(LocalDateTime.now());
    System.out.println("121123"+shoppingCart);
    shoppingCartMapper.insert(shoppingCart);

}
    }

    /**
     * 查看购物车
     * @return
     */
    @Override
    public List<ShoppingCart> showShoppingCart() {
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    /**
     * 清空购物车
     */
    @Override
    public void cleanShoppingCart() {
        Long userId =BaseContext.getCurrentId();
        shoppingCartMapper.deleteByUserId(userId);
    }

    @Override
    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart =new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list =shoppingCartMapper.list(shoppingCart);
        if (list!=null&&list.size()>0){
            shoppingCart=list.get(0);
            Integer number =shoppingCart.getNumber();
            if (number==1){
                //当前购物车记录为1，删除但全国记录
                shoppingCartMapper.deleteById(shoppingCart.getId());

            }else {
                //当前购物车份数不为1，修改份数
                shoppingCart.setNumber(shoppingCart.getNumber()-1);
                shoppingCartMapper.updateNumberById(shoppingCart);
            }
        }
    }
}
